- #1
TerGrim
- 2
- 0
Hi!
I am working on a project (hobby basis) and with limited EE background.
I wish to make a polar plot, showing the current and voltage phasors for each phase (unbalanced 3-phase, 3 wire system (IT system), se picture below.).
I have obtained the following readings (instantaneous values):
For the voltage phasors, I could use the following cosine, since I have the phase-to-phase, and phase to ground voltage readings.
For the currents, since I read the instantaneous currents, is the length of my current phasor equal to this value? And to get the angle, I would use the angle of voltage phasor, and then shift it again using the angle calculated from the power factor?
Am I on the right track?
Sorry if my post is messy, give me feedback if anything has to change.
Best regards from Germany :)
I am working on a project (hobby basis) and with limited EE background.
I wish to make a polar plot, showing the current and voltage phasors for each phase (unbalanced 3-phase, 3 wire system (IT system), se picture below.).
I have obtained the following readings (instantaneous values):
- Phase to phase voltages (U12, U23, U31)
- phase to ground voltages (U1, U2, U3)
- currents (i1, i2, i3) I believe these are measured as line currents, so have to divide by sqrt(3) to get the phase currents as my setup is connected in wye config (not grounded).
- power factor for each phase, so I can calculate the phase difference between the voltage and current phasor.
For the voltage phasors, I could use the following cosine, since I have the phase-to-phase, and phase to ground voltage readings.
For the currents, since I read the instantaneous currents, is the length of my current phasor equal to this value? And to get the angle, I would use the angle of voltage phasor, and then shift it again using the angle calculated from the power factor?
Am I on the right track?
Best regards from Germany :)